ORIORI dual-use convenient phone armband and shopping tote bag

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ORIORI Magic armband is a dual-use convenient phone armband for sport and unfolding is a large-capacity shopping tote bag.
More info:
The armband can be used for hiking, fitness, running and cycling etc sport. when it become a shopping bag, could withstand the weight of 7 bottles of beer or more.
When strenuous exercise, it will not be thrown out. Fit your arm curvature,  firm and not slippery.